\toprule
& \multicolumn{3}{c}{Power} \\ \cmidrule{2-4}
Effect size & 60\% & 80\% & 95\% \\
\midrule
0.1 & 0.40 & 0.35 & 0.28 \\
0.2 & 0.55 & 0.42 & 0.40 \\
0.5 & 0.80 & 0.80 & 0.69 \\
0.8 & 0.80 & 0.80 & 0.80 \\
\bottomrule